Acrylic vs Cement Putty
Acrylic Putty: Polymer-based putty like Asian Paints Acrylic Putty is the premium choice. It offers superior adhesion, flexibility, smooth finish, and resistance to cracking. Acrylic putty can be applied in thinner layers, dries faster, and does not require water curing. It is ideal for interior walls where a premium finish is desired. Price: Rs. 250-400 per 20 kg bag. Coverage: 18-22 sq.ft. per kg for 2 coats.
Cement Putty: Like Birla White Wall Putty, this is cement-based and more economical. It provides good filling for larger imperfections and is suitable for both interior and exterior use. However, it is harder, more brittle, and requires water curing after application. Price: Rs. 150-250 per 20 kg bag. Coverage: 15-18 sq.ft. per kg for 2 coats.
When to Use Putty
Putty is essential before any premium or mid-range paint application. For new plaster, 2 coats of putty are needed — the first coat fills major imperfections, and the second coat creates the final smooth surface. For repainting, one coat of putty is usually sufficient to repair minor cracks and refresh the surface. Skip putty only when using economy distemper on non-critical surfaces.
Application Method
Prepare the surface by scraping loose material and cleaning dust. Mix putty with water to a smooth paste consistency. Apply with a putty knife or flat trowel in thin, even layers. For two-coat application, let the first coat dry 4-6 hours, then lightly sand before applying the second coat. After the final coat, sand smooth with 180-220 grit sandpaper. The surface should feel glass-smooth to the touch before applying primer. Always apply primer over putty — never apply paint directly on putty.